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何気ない， 何気無い， なにげない
1. casual, unconcerned, nonchalant, indifferent, offhand
2. ordinary, normal, regular, everyday, unremarkable
tbd
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違和感， いわかん
1. uncomfortable feeling, feeling out of place, sense of discomfort
2. malaise, physical unease
不适感，格格不入的感觉，不舒服的感觉；不适感，身体不适
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しっかり， 確り， 聢り
1. tightly (holding on), firmly, securely
2. strongly (built), solidly, sturdily, steadily
3. properly, well, sufficiently, hard (working, etc.), fully, completely
4. reliably, dependably, levelheadedly, shrewdly, wisely, cleverly
适当地、良好地、足够地、努力地(工作等)；充分地、彻底地；紧紧地（抓住），牢固地，安全地；坚固地，牢固地，稳固地，稳定地；可靠地、值得信赖地、头脑冷静地、精明地、明智地、巧妙地
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同じ， おなじ， おんなじ
1. same, identical, equal, alike, equivalent
2. anyway, in any case, if one must ..., if one has to ..., as long as ...
相同，同样